Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Condensed Balance Sheets [Abstract]
Trade receivables, allowance for credit losses	$ 11	$ 11
Common stock, par value	$ 0.1	$ 0.1
Common stock, shares authorized	10,000,000	10,000,000
Common stock, shares issued	3,428,021	3,428,021
Common stock, shares outstanding	3,428,021	3,428,021